/* 首页 Hero 设计 */
.hero {
    height: 80vh;
    background: url('https://source.unsplash.com/1600x900/?study,books') center/cover no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

/* 登录 & 注册页面 */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 90vh;
}

.auth-box {
    width: 350px;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
    background: white;
}

.auth-box h2 {
    margin-bottom: 20px;
}

.btn-primary, .btn-success {
    padding: 10px;
    font-size: 1.1rem;
}

.btn-outline-light {
    color: white;
    border: 2px solid white;
}

.btn-outline-light:hover {
    background: white;
    color: black;
}


